2 December 2013 High-repetition-rate tunable mid-infrared optical parametric oscillator based on MgO: periodically poled lithium niobate
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Abstract
A mid-infrared optical parametric oscillator (OPO) with an idler wavelength of 3.85 μm at a repetition rate of 200 kHz is presented, and a high-repetition-rate electro-optic (EO) Q-switched NdGdVO4 laser with a double-crystal RbTiOPO4 EO modulator is used as the pump source. The OPO is designed as an extracavity singly resonant optical parametric oscillator. The threshold value of the OPO system is only 1.3 W at 1.06 μm. When the MgO: periodically poled lithium niobate (MgO: PPLN) crystal is operated at 90°C and the pump power is 10.5 W with a repetition of 200 kHz, a maximum average output power of 1.82 W at idler wavelength of 3.85 μm and pulse width of 14.3 ns are obtained. The slope efficiency of the 3.85-μm laser with respect to the pump laser is 21.3%. The M2 factors of the 3.85-μm laser are 1.84 and 1.76 in the parallel and perpendicular directions, respectively. The mid-infrared tunability of 3.7 to 3.9 μm can be achieved by adjusting the temperature of MgOPPLN crystal from 210 to 35°C.
© 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
Yongji Yu, Yongji Yu, Xinyu Chen, Xinyu Chen, Jing Zhao, Jing Zhao, Chao Wang, Chao Wang, Chunting Wu, Chunting Wu, Guangyong Jin, Guangyong Jin, } "High-repetition-rate tunable mid-infrared optical parametric oscillator based on MgO: periodically poled lithium niobate," Optical Engineering 53(6), 061604 (2 December 2013). https://doi.org/10.1117/1.OE.53.6.061604 . Submission:
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